Fort Worth daily gazette. (Fort Worth, Tex.) 1882-1891, 1887-11-27
POPULAR SCIENCE.
Various Items OF Interest Gathered from
Here and There.

= Here and There.
One barrel OF lime will lay 1000 brick
: In the Bodleian Library at Oxford faded
l INK on parchment, ETC., is restored BY
! means of solution OF hydrosulphide o.
ammonia.
There is no syto temper brass except
by hammering. There is no chemical OF
heating process for tempering anything
but steel.
One plank nine feet wide and twenty
feet long, without knot or bIemish of any
kind, and another twelve feet wide, are
among the contributions If British Co.
lumbia to the Liverpool Exhibition.
"Biuestone" dissolvet in water will
blscken the surface OF sheet zinc SO that
it will not rub OF. Wetting the surface
OF the zinc and rubbing the bluestone
over 1t will have the same effect.
There are over 2600 soldiers in the Rus
sian army afflicted with opthalmia in the
hospitals Of the Odessa district alone.
These cases are Dtirely treated by nurses
and have no skilled medical attendance.
When the power required and the shaft
speed are given, to find the diameter OF q
shaft multiply the given power by SO, 900,
divide this prodnct by 600 and the speed,
and the cube root Of this quotient will be
the diameter required.
You can weld mallesble cast iron plates
by riVeting them together and using q fluX
Of powdered borax and Norwegian or
crucible steel filings, equal parts. Let
the first blows with your hammer be ten
der ones Manufacturers Gazette.
Gleditschine, not stenocarpine, as the
name Of the new ap2 3thetic has been
finally determined, ought to be at once
| adopted in place Of the incorrect term
"stenocsrpine." The drug, we learn, is
as yet very expensive and somewhat diff
cult to GET Medical Record.
The "tuchmig" of the Chinese, or Pra-
| meria glandulifera of botanists, grows in
Southern India, End has been recon-
mended to the Indian government as &
tree from which large quantities of
caoutchouc Can be drawn. In the South
American tree the caoutchouc flows from
punctures in the bark, but from the new
source the gum is obtained by breaking
the boughs and drawing il out In fills
ments.
The Builder and Wood-Work9r points
out that the color Of the mortar used
with different cOlors of bricks is sadly
neglected. The effect of pointing red
brick work with white mortar is bad.
Furnace ashes and lime will produce dark
mortar, while red tone may be obtained
by mixing with the lime pounded red
brick or red tile. Cheap mineral colors
will produce any desired color for point |
ing.
A newly constructed railroad spike has |
a double head, Or, more properly speak.
ing, an elongated portion projecting from |
opposite SIDES Of the shank. The under |
side of one projection is lower than that |
OF the other, the portion which is lower
being provided with an edge IN the direc-
ton OF its length, whereby the portion
may be more easily imbedded in the tie or
sleeper, while the other portion of the
head engages the rail.
1t is said that embossed ornamentatiop
or embossed gilt lettering on glass as
done by hYdrofuoric acid can be CLOSELY
Initiated by painting In the design with
rather thick damar varnish. Water-glsss,
Canada oalsam (Ghinned with turpentine.
If required or solution of gum arabic.
A little sugar Of lead introduced into the
vehicle used will produce a ground-elsss
effect. COlors may be used and gliding
put ov 5r the design if desired.
1t is claimed that very bright surface
which resembles a mother of-pearl flash
may be given to paper by pursuing the
following directions: A very concetrated
cold solution Of salt is mixed with dex- (
trine, and thin coating of the
fluid laid on the surface of the paper by
means OF broad, soft brush. 1t is then
allowed to dry. The most advantageous
salts are sulphate of tin, sulphate of I
nagnesia and acetate of soda. It IS {
for the paper to be sized first. {
Or it will absorb the liquid and prevent /
crystalline formations. t
Where the unframed eye will see moth q
ng but mire and dirt, says Sir John Luo- c
DOCK, science will often reveal exquisite
possibilities. The mud we tread under y
'ur feet in the street is a grimy mixture .
II clay and sand, SCOT and water Sep Z
rate the sand, however, as Ruskln =
,oserVes-let the atoms arrange
themselves in peace according to >
heir nature-and you have the opal.
separate the clay and it becomes a "
White earth, fit for the finest porcelain; or
1t still further purifies itself, you have
sapphire. Take the SCOT, and if prop u
Fly treated it will give you diamond. Il
nile, lastly, the water, purified and dis
lIleo, Will become dewdrop or crystal ~ ~
re into lovely star. Or again YOU NAV &c
ee in shallow pool either the mud living g.
the bottom or the image of the sky u
bove.
Experiments are being made on Prus- y. ~
sn railways with axle boxes fitted with :. ~
earrings Of vegetable parchment in place ~ ~
brass. The parchment is strongly =
Impressed before being used, and it is -, ~
thoroughly dried to prevent subsequent ~ -.
Wooden rings are placed on ue
lie outside of the bearings, f. 81 :"
ng the collars of the journal a :.
q emulsion of water and oil ~,
Ia all the mineral oils are used as lubri- III III
nts. The parchment soon becomes i'm pi
egnated with the oil and is able to 90 a
ne time without q renewal of lubrics- 70
IN. 1t is between the body of the w,
urnal and the thin edge of the parch- 49,,
emit segments that friction takes place eN'
lie claim is made that these compressed
per bearings make tough material VI;
st is superior to metal Such bearings 10 10
2 also in use in a German saw mil. 1ne
tn satisfactory operation. loi
The Societe Industrielle, OF Brussels, "a
constructed new accumulator, the IL
'ention OF NJ. famine, civil engineer. Pc
G element is composed of number Of ~
lnected plates for positive and g thin AiA
,et OF lead, one nm. Zone twenty fifth
NJ IN thickness, for negative. The fol- 5
ing is the composition of var
liquid: Saturated solution his
inn R1r-